Biology

The correct answer is: D.Temporal or behavioural factors

Explanation:

In sympatric speciation, reproductive isolation occurs within the same geographic area, and it is often caused by factors that prevent interbreeding between populations, despite them living in close proximity. Temporal (timing of mating) and behavioral (such as mating rituals or preferences) factors are common causes of reproductive isolation in sympatric speciation. For example, if two populations of the same species mate at different times of the year (temporal isolation) or have different mating behaviors (behavioral isolation), they may no longer interbreed, eventually leading to speciation.

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